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Texas trails · Arroyo Primero

Arroyo Primero

A 4.8-mile network in Texas, with 875 ft of climbing. Reaches Trough Spring. Managed by the state.

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Length
4.8 mi
Elevation gain
875 ft
Difficulty
Moderate
Max grade
16%
Steepest mile
+389 ft
Tread at ≥10% grade
0.6 mi
Shape
network
Managed by
State

Elevation profile

3,309 – 4,173 ft1234

The climbing leans toward the final third: 52% of the ascent falls between mile 3.2 and mile 4.8. It climbs almost continuously, with little descent to recover on.

3-D terrain

3-D terrain view of Arroyo Primero

USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5

Reaches

Heads up

Stream ford: expect at least one unbridged crossing.

Getting there

Arroyo Primero access. 29.37732, -103.90888 · directions

Daylight at the trailhead

On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 7:32 a.m., the sun rises at 7:56 a.m. and sets at 7:26 p.m., and the last usable light fades about 7:50 p.m. (CDT) — 11 h 30 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 4.8-mile route takes roughly 2 h 13 min, so leaving the trailhead at sunrise puts you back around 10:09 a.m. — 9 h 18 min before sunset.

Loop options

Nearby trails